Faculty Profiles - KISHIDA Hideo

Papers - KISHIDA Hideo

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Visualization of local valence structures in quasi-one-dimensional halogen-bridged complexes [Ni_1-xPd_x(chxn)₂Br]Br₂ by STM Reviewed

S.Takaishi, H. Miyasaka, K. Sugiura, M. Yamashita, H. Matsuzaki, H. Kishida, H. Okamoto, H. Tanaka, K. Marumoto, H. Ito, S. Kuroda, T. Takami

Angewandte Chemie International Edition Vol. 43 page： 3171-3175 2004.6

Third-harmonic generation in CT-type conjugated polymers Reviewed

H. Kishida, H. Okamoto, B. L. Lee, H. Kokubo, and T. Yamamoto

Transaction of the Materials Research Society of Japan Vol. 29 ( 3 ) page： 981-984 2004.5

Carrier Doping Effect into Quasi-One-Dimensional Bromo-Bridged Ni(III) Complexes with Strong Electron-Correlation by Cu(II) Ions, [Ni_1-xCu_x(chxn)₂Br]Br_2-x Reviewed

M. Yamashita, T. Ono, S. Matsunaga, M. Sasaki, S. Takaishi, F. Iwahori, H. Miyasaka, K. Sugiura, H. Kishida, H. Okamoto, H. Tanaka, Y. Hasegawa, K. Marumoto, H. Ito, S. Kuroda, N. Kimura

Inorganic Chemistry Vol. 42 ( 24 ) page： 7692-7694 2003.10

Language：English Publishing type：Research paper (scientific journal)

This communication will describe the electron doping effect into NiIII complexes by CuII ions, [Ni1-xCux(chxn)2Br]Br2-x (x = 0.038 and 0.101) by using an electrochemical oxidation method. A drastic increase of electrical conductivity as well as a new absorption band around 0.5 eV in single crystal reflectance spectra was observed by doping CuII ions, indicating the electron doping was successfully made. An ESR result shows unpaired electrons locate in the dx2-y2 orbitals of CuII and have almost no interaction with those of other ions.

DOI： 10.1021/ic0349555

Novel ET-Coordinated Copper(I) Complexes: Syntheses, Structures, and Physical Properties (ET = BEDT-TTF = Bis(ethylenedithio)tetrathiafulvalene) Reviewed

R. Kanehama, M. Umemiya, F. Iwahori, H. Miyasaka, K. Sugiura, M. Yamashita, Y. Yokochi, H. Ito, S. Kuroda, H. Kishida, H. Okamoto

Inorganic Chemistry Vol. 42 ( 22 ) page： 7173-7181 2003.10

Language：English Publishing type：Research paper (scientific journal)

New molecular charge-transfer complexes of bis(ethylenedithio)tetrathiafulvalene (ET), (ET)Cu2Br4 (1), (ET)2Cu6Br10 (2), (ET)2[Cu4Br6ET] (3), (ET)2Cu2Br4 (4), (ET)2Cu3Br7(H2O) (5), and (ET)2Cu6Br10(H2O)2 (6), have been synthesized by diffusing reaction of ET and CuIIBr2. Their crystal structures and physical properties have been investigated. X-ray analyses revealed that ET molecules coordinated to the copper ions with the sulfur atoms of the ethylenedithio groups in all compounds. The Cu-S distances are found in the range 2.268(5)-2.417(8) Å, being close to the typical CuI-S coordination bond distances. Strong d- interactions between d-electrons of the copper ions and -electrons of the ET molecules can be expected through the Cu-S coordination bonds. ET molecules behave as trans-bidentate ligands bonding to two different copper ions in 1 and 3, as cis-bidentate ligands in 2, 5, and 6, and as monodentate ligands in 4. In the crystal structure of 3, there are two types of ET molecules in the crystal structure, where the first type is a trans-bidentate ligand and the second forms a stacking structure by itself. Compounds 1, 2, 4, and 6 show semiconducting behavior down to low temperature (RT = 1.6 × 10-2 S cm-1 and Ea = 122 meV for 1, RT = 2.1 S cm-1 and Ea = 21 meV for 2, RT = 5.4 × 10-4 S cm-1 and Ea = 239 meV for 4, and RT = 5.1 × 10-2 S cm-1 and Ea = 207 meV for 6). On the other hand, in 3, a metal-like region is observed along the b-axis and c-axis, due to the contribution of stacked ET molecules, and a metal-semiconductor transition occurs at 280 and 270 K, respectively. Also, 5 exhibits metallic conductivity in the temperature ranges 240-300 and 200-300 K along the b-axis and c-axis, respectively, despite the oxidation state of ET with 2+.

DOI： 10.1021/ic0344362

Third-order nonlinear optical spectroscopy in the two-dimensional cuprates Nd₂CuO₄ and La₂CuO₄ Reviewed

H. Kishida, M. Ono, A. Sawa, M. Kawasaki, Y. Tokura, H. Okamoto

Physical Review B Vol. 68 ( 7 ) page： 075101-1 - 075101-5 2003.8

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

We have measured third-order nonlinear susceptibility (χ(3)) spectra of the two-dimensional (2D) cuprates La2CuO4 and Nd2CuO4 by third-harmonic generation. The |χ(3)| spectra exhibit broad peaks with maximum values of 0.6×10-10 esu in La2CuO4 and 2×10-10 esu in Nd2CuO4. These peaks are attributable to three-photon resonance to the charge transfer (CT) excited state. The χ(3) phase spectrum of Nd2CuO4 has revealed that the two-photon resonance to the even CT state are hidden on the high-energy side of the χ(3) peak. The difference in χ(3) values between the 2D and 1D cuprates is discussed by considering differences in spin-charge coupling and in charge configurations between the 2D and 1D cases.

DOI： 10.1103/PhysRevB.68.075101

Ultrafast Optical Switching to a Metallic State by Photoinduced Mott Transitionin a Halogen-Bridged Nickel-Chain Compound Reviewed

S. Iwai, M. Ono, A. Maeda, H. Matsuzaki, H. Kishida, H. Okamoto, Y. Tokura

Physical Review Letters Vol. 91 ( 5 ) page： 057401-1 - 057401-4 2003.8

Language：English Publishing type：Research paper (scientific journal)

We demonstrate the ultrafast photoinduced Mott transition from a charge transfer insulator to a
metal in a halogen-bridged Ni-chain compound by pump-probe reflection spectroscopy. Upon the
irradiation of a 130-femtosecond laser pulse, the spectral weight of the gap transition is transferred to
the inner-gap region. When the photoexcitation density exceeds 0:1=Ni site, the Drude-like highreflection
band appears in the infrared region, signaling the formation of a metallic state. The
photogeneration of the metallic state and the subsequent recovery to the original gapped state occur
within a few picoseconds.

DOI： 10.1103/PhysRevLett.91.057401

New charge-transfer salts (ET)₈(Mn^IIBr₄)₂(DCE)₂ and (ET)₃Mn^IIBr₄: Preparations, structures and physical properties (ET = BEDT-TTF, DCE = 1,2-dichloroethane) Reviewed

R. Kanehama, H. Miyasaka, K. Sugiura, M. Yamashita, H. Itou, S. Kuroda, H. Kishida and H. Okamoto

Synthetic Metals Vol. 135-136 ( 4 ) page： 633-634 2003.4

Novel charge-ordering and photo-induced phase transition in MMX chain compounds: R₄[Pt₂(pop)₄I] Reviewed

H. Matsuzaki, H. Kishida, K. Takizawa, M. Yamashita and H. Okamoto

Synthetic Metals Vol. 135-136 ( 4 ) page： 607-608 2003.4

Tuning of spin density wave strength of Ni(III) complexes with strong electron-correlation Reviewed

T. Ono, M. Yamashita, K. Yokoyama, S. Furukawa, T. Manabe, K. Sugiura, T. Ishii, H. Miyasaka, H. Matsuzaki, H. Kishida, H. Okamoto, K. Marumoto, H. Tanaka, Y. Hasegawa, S. Kuroda, H. Itou

Synthetic Metals Vol. 135-136 ( 4 ) page： 357-358 2003.4

Gigantic Third-order Optical Nonlinearity in One-dimensional Mott Insulators Reviewed

H. Kishida, M. Ono, H. Matsuzaki, M. Yamashita, Y. Taguchi, Y. Tokura and H. Okamoto

Synthetic Metals Vol. 135-136 ( 4 ) page： 315-316 2003.4

Large Optical Nonlinearity in 1D and 2D Cuprates Investigated by Third Harmonic Generation Spectroscopy Reviewed

M. Ono, H. Kishida, H. Okamoto, T. Manako, M. Izumi, A. Sawa, M. Kawasaki and Y. Tokura

Synthetic Metals Vol. 135-136 ( 4 ) page： 313-314 2003.4

Coherent valence fluctuation in photo-induced neutral-ionic transition of an one-dimensional charge transfer complex Reviewed

S. Iwai, S. Tanaka, K. Fujinuma, H. Kishida, H. Okamoato, Y. Tokura

Ultrafast Phenomena XIII, Springer Series in Chemical Physics Vol. 71 page： 546-548 2003.4

Synthesis of a New Thiophene/Quinoxaline CT-Type Copolymer with High Solubility and Its Basic Optical Properties Reviewed

T. Yamamoto, B. L. Lee, H. Kokubo, H. Kishida, K. Hirota , T. Wakabayashi, H. Okamoto

Macromolecular Rapid Communications Vol. 24 ( 5-6 ) page： 440 - 443 2003.5

Language：English Publishing type：Research paper (scientific journal)

A new -conjugated charge-transfer-type copolymer of electron-donating thiophene and electron-accepting quinoxaline was prepared by organometallic polycondensation. The polymer was soluble in organic solvents such as tetrahydrofuran, and showed a UV-vis peak at long wavelengths of 598 nm in chloroform and 629 nm in the film. Its film exhibited a (3) peak in the resonance region with a (3) value comparable to that of regioregular head-to-tail poly(3-hexylthiophene-2,5-diyl).

DOI： 10.1002/marc.200390067

Unprecedented Soliton Formation Mechanism in Quasi-One-Dimensional Chloro-Bridged Pt^II-Pt^IV Mixed-Valence Compound, {[Pt(en)₂][PtCl₂(en)₂]g₃(CuCl₄)₄・12H₂O Reviewed

M. Yamashita, H. Aso, S. Matsunaga, K. Takizawa, K. Nakata, C. Kachi-Terajima, F. Iwahori, T. Ishii, H. Miyasaka, K. Sugiura, T. Kawashima, K. Takai, N. Kuroda,M. Shiro, H. Kishida, H. Okamoto, H. Takahashi, H. Tanaka, K. Marumoto, S. Kuroda

Chemistry Letters Vol. 32 ( 3 ) page： 278-279 2003.3

Language：English Publishing type：Research paper (scientific journal)

A new type of complex consisting of double liner-chain
structure {[Pt(en)2][PtCl2(en)2]g3(CuCl4)412H2O was synthesized. High concentration (ca. 200 times larger than the literature) of neutral soliton (PtIII component) formation was found. This unprecedented soliton formation mechanism will be discussed.

DOI： 10.1246/cl.2003.278

Electric field effect on charge and lattice dynamics in TTF-QCl₄ and TTF-QBrCl₃ Reviewed

H. Kishida, K. Fujinuma, H. Takamatsu, H. Okamoto, S. Horiuchi, Y. Tokura

Synthetic Metals Vol. 133-134 ( 13 ) page： 633-635 2003.3

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

Electroreflectance (ER) spectra are measured on the mixed-stack charge transfer (CT) complexes, tetrathiafulvalane (TTF)-2-bromo-3,5,6-trichloro-p-benzoquinone (QBrCl3) and TTF-p-chloranil (QCl4), showing the neutral–ionic (N–I) phase transition. In the N phase of TTF-QBrCl3, we observe a large ER signal, which originates from the electric field-induced I domains in the N stacks. In contrast, no ER signal is obtained in the N phase of TTF-QCl4. The difference of the ER signal intensity between the two compounds is discussed by taking account of the difference in the degree of the valence instability.

DOI： 10.1016/S0379-6779(02)00357-0

Novel Optical and Magnetic Bistability and Photoinduced Transition in a One-Dimensional Halogen-Bridged Binuclear Pt Complex Reviewed

H. Matsuzaki, T. Matsuoka, H. Kishida, K. Takizawa, H. Miyasaka, K. Sugiura, M. Yamashita, H. Okamoto

Physical Review Letters Vol. 90 ( 4 ) page： 046401-1-046401-4 2003.1

Language：English Publishing type：Research paper (scientific journal)

In iodine-bridged binuclear Pt compounds, R4Pt2pop4InH2O and R02Pt2pop4InH2O (pop P2O5H2 2 ), electronic structures on the PtPtI chains have been controlled between a diamagnetic chargedensity-
wave (CDW) state and a paramagnetic charge-polarization (CP) state by modification of the
counterions (R, R0) located between chains. In the R C2H52NH2 compound, a pressure-induced CP
to CDW transition with a drastic color change is identified. This transition is accompanied by a large
hysteresis loop within which photoinduced transition between CDWand CP can be driven by selecting
the excitation photon energy.

DOI： 10.1103/PhysRevLett.90.046401

Gigantic optical nonlinearity in one-dimensional Mott insulators Reviewed

H. Okamoto, H. Kishida, M. Ono, H. Matsuzaki, Y. Taguchi, Y. Tokura, M. Yamashita

Nonliear Optics Vol. 29 ( 10-12 ) page： 687 - 695 2002.10

Ultrafast primary process of photo-induced N-I transition and macroscopic oscillation of domain boundary in TTF-CA Reviewed

S. Iwai, S. Tanaka, K. Fujinuma, H. Kishida, H. Okamoto, Y. Tokura

Phase Transitions Vol. 75 ( 7-8 ) page： 807 - 813 2002.10

Magnetic/Conducting Hybrid Compound Composed of 1-D Chain[Mn^II₂Cl₅(EtOH)]_∞^- and BEDT-TTF Stacking Layer Reviewed

H. Miyasaka, Y. Yoshino, T. Ishii, R. Kanehama, T. Manabe,M. Yamashita, H. Nishikawa, I. Ikemoto, H. Kishida, H. Matsuzaki, H. Okamoto

Journal of Solid State Chemistry Vol. 168 page： 418 - 426 2002.11

Tuning of Spin Density Wave Strengths in Quasi-One-DimensionalMixed-Halogen-Bridged Nickel(III) Complexes with Strong ElectronCorrelation, [Ni^III(chxn)₂Cl_1-xBr_x](NO₃)₂ Reviewed

T. Manabe, K. Yokoyama, S. Furukawa, C. Kachi-Terajima, K. Nakata, F. Iwahori, H. Miyasaka, K. Sugiura, M. Yamashita, H. Kishida, H. Okamoto

Inorganic Chemistry Vol. 41 ( 20 ) page： 4993 - 4995 2002.9

Language：English Publishing type：Research paper (scientific journal)

This communication describes the syntheses of the quasi-onedimensional
mixed-halogen-bridged NiIII complexes with strong
electron correlation [Ni(chxn)2Cl1-xBrx](NO3)2 and the tuning of the
spin density wave strengths of these compounds. If the Cl 3p and
Br 4p make one band in the compounds, we should observe a
single peak in the electronic spectra. As a result, we should observe
the single peak from 1.45 to 2.00 eV depending on the mixing
ratios of Cl and Br ions. Therefore, the Cl 3p and Br 4p make one
band. Then, we have succeeded in tuning the spin density wave
strengths of the NiIII complexes with the strong electron correlation
by mixing the bridging halogen ions successively.

DOI： 10.1021/ic025654i

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